Lennon's Killer Obsessed With Lindsay Lohan

The man who killed John Lennon has reportedly become obsessed with Lindsay Lohan--he's even turned his jail cell into a Lohan shrine. Creeeeepy!

Mark David Chapman, who has been incarcerated for 27 years now, has allegedly begged Lohan to visit him at Attica State Prison in New York. He became obsessed with her when she took on the role of his girlfriend for the movie 'Chapter 27.'

A source at the prison tells Ireland's Sunday World newspaper, "He has been pleading with the authorities to let him write to her and visit him. He's been turned down flat, but he won't give up."

Chapman is considered so dangerous (he was diagnosed as psychotic) that he is currently in solitary confinement--which is a good thing for Lohan.